Enclosure for an electronic device having a shell and internal chassis
A housing or enclosure for an electronic device is formed from a shell and chassis may positioned along an interior of the shell. The shell may be formed from a hard or cosmetic material and the chassis may be formed from a machinable material. The chassis may define one or more machined surfaces that are configured to receive or mount a component of the electronic device.
1. An electronic device, comprising:
a shell forming an exterior surface of the electronic device, the shell comprising a first material;
a chassis formed along an interior of the shell and defining a machined shelf, the chassis comprising a second material;
a display positioned at least partially within the shell; and
a transparent cover positioned over the display and compliantly coupled to the machined shelf to form a seal between the transparent cover and the machined shelf.
2. The electronic device of claim 1 , wherein the chassis is formed from a chassis material having a machinability that is greater than a machinability of the shell.
3. The electronic device of claim 1 , wherein:
the shell includes a back surface opposite the transparent cover;
the back surface defines an opening;
the chassis defines an attachment feature within the opening;
a back cover is coupled to the attachment feature of the chassis; and
an additional seal is formed between the attachment feature and the back cover by a compliant engagement of the attachment feature with the back cover.
4. The electronic device of claim 1 , wherein the transparent cover is press fit within the machined shelf.
5. The electronic device of claim 1 , wherein:
the chassis further comprises a set of threaded mounts; and
the electronic device further comprises a circuit board attached to the set of threaded mounts.
6. The electronic device of claim 1 , wherein:
the shell defines a first portion of an opening configured to receive a component; and
the chassis defines a second portion of the opening configured to receive the component.
7. The electronic device of claim 6 , wherein:
the component is a compressible button; and
the second portion of the opening defines a surface configured to receive the compressible button.
8. The electronic device of claim 7 , further comprising:
an O-ring positioned between the second portion of the opening and the compressible button and configured to form a button seal between the chassis and the compressible button.
9. The electronic device of claim 1 , wherein:
the shell comprises a ceramic material; and
the chassis comprises at least one of: aluminum, machine steel, or plastic.
10. An electronic device, comprising:
a ceramic shell forming an external surface of the electronic device and defining a display opening and a first portion of a component opening formed along the external surface;
a display positioned within the display opening;
a machined chassis formed from a material different than the ceramic shell and coupled to an interior surface of the shell, the machined chassis defining a second portion of the component opening; and
a component positioned within the component opening.
11. The electronic device of claim 10 , wherein the second portion of the component opening defines a contoured surface.
12. The electronic device of claim 11 , wherein:
the component opening extends along a length of the shell; and
the second portion of the component opening has a maximum width that is greater than an opening width of the first portion along the external surface.
13. The electronic device of claim 11 , wherein:
the machined chassis defines a shelf along a perimeter of the display opening;
the electronic device further comprises a transparent cover positioned over the display; and
the shelf and the transparent cover cooperate to form a seal configured to prevent ingress of contaminants into the electronic device by a compliant engagement of a surface of the shelf with the transparent cover.